Validate config file

ishare2

@@ -93,6 +93,61 @@ function create_config() {
         echo -e "${RED} [!] Failed to create configuration file. Please try again.${NO_COLOR}"
         exit 1
     fi
+    remove_duplicates
+}
+
+remove_duplicates() {
+    local config_file="$ISHARE2_DIR/ishare2.conf"
+
+    # Check if the configuration file exists
+    if [ ! -f "$config_file" ]; then
+        echo -e "${RED} [!] Configuration file does not exist.${NO_COLOR}"
+        return
+    fi
+
+    # Remove duplicate lines from the configuration file
+    awk '!seen[$0]++' "$config_file" >"$config_file.tmp" && mv "$config_file.tmp" "$config_file"
+
+    echo -e "${GREEN} [+] Duplicates removed from the configuration file.${NO_COLOR}"
+}
+
+validate_conf_file() {
+    local config_file="$ISHARE2_DIR/ishare2.conf"
+
+    # Check if the configuration file exists
+    if [ ! -f "$config_file" ]; then
+        echo -e "${RED} [!] Configuration file does not exist.${NO_COLOR}"
+        return 1
+    fi
+
+    # Array of allowed variables
+    local allowed_vars=("USE_ARIA2C" "CHANNEL")
+
+    # Read the configuration file line by line and filter out invalid variables
+    local filtered_content=""
+    while IFS= read -r line; do
+        # Skip empty lines and comments
+        if [[ -z "$line" || "$line" == \#* ]]; then
+            continue
+        fi
+
+        # Extract variable name
+        local var_name="${line%%=*}"
+
+        # Check if the variable is allowed
+        if [[ " ${allowed_vars[@]} " =~ " $var_name " ]]; then
+            filtered_content+="$line"$'\n'
+        else
+            echo -e "${RED} [!] Removing invalid variable from the configuration file: $line.${NO_COLOR}"
+        fi
+    done <"$config_file"
+
+    # Write the filtered content back to the configuration file
+    echo "$filtered_content" >"$config_file"
+
+    echo -e "${GREEN} [+] Configuration file validated and updated.${NO_COLOR}" >$ISHARE2_DIR/logs.txt
+    source "$config_file"
+    return 0
 }
 
 function install_aria2c() {